Change blog popup x to custom icon

[tuanphan]

Use this code to Custom CSS box. Replace Pixabay with your custom icon url

[class*="Popup"] svg {
    visibility: hidden;
}
[class*="Popup"] button[class*="PopupClose"] {
    background-image: url(https://cdn.pixabay.com/photo/2022/07/24/11/35/women-7341444_1280.jpg);
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center center;
}

Result